Process for preparing polyether polyols

Abstract

The present invention relates to a process for the catalytic preparation of polyetherols, wherein the power input by means of at least one stirrer and/or by means of at least one pump, based on the reactor volume, is in the range from 0.001 to 8.2 kW/m 3 .

The invention claimed is: 
     
       1. A process comprising catalytically preparing a polyetherol in a reactor comprising at least one pump and no stirrer, wherein power is input by the pump, based on the reactor volume, in a range from 0.001 to 1 kW/m 3 , and which process is carried out in batch form. 
     
     
       2. The process according to  claim 1 , wherein at least one baffle is used. 
     
     
       3. A polyetherol prepared by the process according to  claim 1 . 
     
     
       4. A process for producing a polyurethane comprising reacting the polyetherol according to  claim 3  with a polyisocyanate. 
     
     
       5. The process according to  claim 1 , wherein the range is from 0.002 to 0.5 kW/m 3 . 
     
     
       6. The process according to  claim 1 , wherein the range is from 0.003 to 0.25 kW/m 3 .